Multiple vulnerabilities in CNCF Envoy
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2020-8664 CVE-2020-8661 CVE-2020-8660 CVE-2020-8659 |
| CWE-ID | CWE-284 CWE-400 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
envoy Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Cloud Native Computing Foundation |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Improper access control
EUVDB-ID: #VU25838
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2020-8664
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions when using SDS with Combined Validation Context. A remote attacker can use the same secret (e.g. trusted CA) across many resources together with the combined validation context and gain unauthorized access to the affected application
Install update from vendor's website.
Vulnerable software versionsenvoy: 1.0.0 - 1.13.0
CPE2.3- cpe:2.3:a:cncf:envoy:1.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.13.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.6.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.8.0:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:envoy:1.9.1:*:*:*:*:*:*:*
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3x9m-pgmg-xpx8
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Resource exhaustion
EUVDB-ID: #VU25837
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-8661
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the affected software consumes excessive amounts of memory when responding internally to pipelined requests. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsenvoy: 1.0.0 - 1.13.0
CPE2.3https://github.com/envoyproxy/envoy/security/advisories/GHSA-36cq-ww7h-p4j7
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Improper access control
EUVDB-ID: #VU25836
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2020-8660
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass TLS inspector.
The vulnerability exists due to the TLS extensions (SNI, ALPN) are not inspected, those connections might been matched to a wrong filter chain. A remote attacker can bypass implemented security restrictions in the process and gain unauthorized access to the application.
MitigationInstall updates from vendor's website.
Vulnerable software versionsenvoy: 1.0.0 - 1.13.0
CPE2.3https://github.com/envoyproxy/envoy/security/advisories/GHSA-c4g8-7grc-5wvx
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Resource exhaustion
EUVDB-ID: #VU25835
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-8659
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the affected software consumes excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsenvoy: 1.0.0 - 1.13.0
CPE2.3https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
